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Chapter 5. Circuit Description
5-1 Power supply circuit and switches
To Auto/Manual
LED, Start/FWD}
'SW and UP/
Down SW
Power Switch
To U/D Sensor,
Tracking Error
[Sensor and
Compensator
4
$106
01
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oy
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ai
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7 el +7.5V
4 q
+7.5V
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°
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LAY §
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Ry
1 | oFF7.6v
3
é
c1o1
Sy
=
=
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ext
=
4
+9
=
O10
sig
a
—| To Carry Motor
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She |
8
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gag] =
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eys/8
8
=
é
ae,
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g Ex
8s
Phono Motor Drive
5
ae
=e
{For holding ON the Solenoid) Keep @ B
Fig. 5
shown in Fig. 6.
For holding ON the solenoid
+12V;
For phono motor and
solenoid drive circuit
+7.5V
For arm UP/DOWN detection,
tracking error detection, com-
pensator, 1C101-IC105, and
initial reset circuit trigger
PLAY 7.8V;
For phono motor drive, initial
reset, solenoid drive trigger,
PLAY LED and STOP/REV
switch
COVER 7.5V; For phono motor drive
circuit trigger
For initial reset
circuit trigger
O—>
OFF 7.8;
N
O—>
ON 7.8v;
For START/FWD switch, UP/
~~
DOWN switch and AUTO/
POWER SW
MANUAL LED
Fig. 6 Connection Diagram (in the play mode)
In Fig. 6, normally, KEEP G@) B the power source
for holding ON the solenoid when the tonearm
is lowered down. Power source +7.5 V is explained
as +7.5
V or
PLAY
7.5
V according to the
respective operation states of each switch.
In addition,
Fig. 5 shows
the practical
wiring
diagram of the power circuit and switches.
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